package com.ruoyi.system.service.impl;

import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import org.springframework.stereotype.Service;
import com.ruoyi.system.service.IAiAssistantService;
import com.ruoyi.system.domain.AiConversation;

/**
 * AI智能助手Service业务层处理
 * 
 * @author ruoyi
 * @date 2025-01-21
 */
@Service
public class AiAssistantServiceImpl implements IAiAssistantService 
{
    // 临时存储对话记录，实际项目中应该使用数据库
    private final Map<Long, AiConversation> conversationMap = new ConcurrentHashMap<>();
    private long conversationIdCounter = 1;

    /**
     * 查询AI对话记录
     * 
     * @param conversationId AI对话记录主键
     * @return AI对话记录
     */
    @Override
    public AiConversation selectAiConversationByConversationId(Long conversationId)
    {
        return conversationMap.get(conversationId);
    }

    /**
     * 查询AI对话记录列表
     * 
     * @param aiConversation AI对话记录
     * @return AI对话记录集合
     */
    @Override
    public List<AiConversation> selectAiConversationList(AiConversation aiConversation)
    {
        List<AiConversation> list = new ArrayList<>();
        for (AiConversation conv : conversationMap.values()) {
            if (aiConversation.getUserId() != null && !aiConversation.getUserId().equals(conv.getUserId())) {
                continue;
            }
            if (aiConversation.getProblemId() != null && !aiConversation.getProblemId().equals(conv.getProblemId())) {
                continue;
            }
            list.add(conv);
        }
        return list;
    }

    /**
     * 新增AI对话记录
     * 
     * @param aiConversation AI对话记录
     * @return 结果
     */
    @Override
    public int insertAiConversation(AiConversation aiConversation)
    {
        if (aiConversation.getConversationId() == null) {
            aiConversation.setConversationId(conversationIdCounter++);
        }
        if (aiConversation.getConversationTime() == null) {
            aiConversation.setConversationTime(new Date());
        }
        conversationMap.put(aiConversation.getConversationId(), aiConversation);
        return 1;
    }

    /**
     * 修改AI对话记录
     * 
     * @param aiConversation AI对话记录
     * @return 结果
     */
    @Override
    public int updateAiConversation(AiConversation aiConversation)
    {
        if (conversationMap.containsKey(aiConversation.getConversationId())) {
            conversationMap.put(aiConversation.getConversationId(), aiConversation);
            return 1;
        }
        return 0;
    }

    /**
     * 批量删除AI对话记录
     * 
     * @param conversationIds 需要删除的AI对话记录主键集合
     * @return 结果
     */
    @Override
    public int deleteAiConversationByConversationIds(String conversationIds)
    {
        String[] ids = conversationIds.split(",");
        int count = 0;
        for (String id : ids) {
            try {
                Long conversationId = Long.parseLong(id.trim());
                if (conversationMap.remove(conversationId) != null) {
                    count++;
                }
            } catch (NumberFormatException e) {
                // 忽略无效的ID
            }
        }
        return count;
    }

    /**
     * 删除AI对话记录信息
     * 
     * @param conversationId AI对话记录主键
     * @return 结果
     */
    @Override
    public int deleteAiConversationByConversationId(Long conversationId)
    {
        return conversationMap.remove(conversationId) != null ? 1 : 0;
    }

    /**
     * 获取AI编程提示
     */
    @Override
    public String getProgrammingHint(String problemId, String questionType, String userCode, String language)
    {
        // 模拟AI提示，实际项目中应该调用真实的AI服务
        Map<String, String> hints = new HashMap<>();
        hints.put("hint", "对于这道题目，你可以考虑使用动态规划的思想。状态转移方程可以帮助你找到最优解。");
        hints.put("analysis", "这道题目的时间复杂度是O(n²)，空间复杂度是O(n)。主要使用了贪心算法的思想。");
        hints.put("optimization", "你的代码可以通过以下方式优化：1. 使用更高效的数据结构 2. 减少不必要的循环 3. 优化内存使用");
        hints.put("debug", "根据错误信息，问题出现在代码逻辑上。建议检查数组边界和变量初始化。");
        
        return hints.getOrDefault(questionType, "我理解你的问题。对于这道题目，建议你先仔细阅读题目描述，理解输入输出格式，然后设计合适的算法。");
    }

    /**
     * 分析代码
     */
    @Override
    public Map<String, Object> analyzeCode(String problemId, String userCode, String language)
    {
        Map<String, Object> analysis = new HashMap<>();
        analysis.put("complexity", "O(n²)");
        analysis.put("spaceComplexity", "O(n)");
        analysis.put("algorithm", "贪心算法");
        analysis.put("suggestions", Arrays.asList("考虑边界情况", "优化循环结构", "使用更高效的数据结构"));
        analysis.put("score", 85);
        return analysis;
    }

    /**
     * 获取代码优化建议
     */
    @Override
    public Map<String, Object> getOptimizationSuggestions(String problemId, String userCode, String language, String optimizationType)
    {
        Map<String, Object> optimization = new HashMap<>();
        optimization.put("type", optimizationType);
        optimization.put("suggestions", Arrays.asList("使用更高效的数据结构", "减少不必要的循环", "优化内存使用"));
        optimization.put("expectedImprovement", "20-30%");
        return optimization;
    }

    /**
     * 获取调试帮助
     */
    @Override
    public Map<String, Object> getDebugHelp(String problemId, String userCode, String language, String errorMessage, String testCase)
    {
        Map<String, Object> debugHelp = new HashMap<>();
        debugHelp.put("errorType", "逻辑错误");
        debugHelp.put("suggestions", Arrays.asList("检查数组边界", "验证变量初始化", "添加调试输出"));
        debugHelp.put("testCase", testCase);
        return debugHelp;
    }

    /**
     * 获取算法解释
     */
    @Override
    public Map<String, Object> getAlgorithmExplanation(String problemId, String algorithmType)
    {
        Map<String, Object> explanation = new HashMap<>();
        explanation.put("algorithm", algorithmType);
        explanation.put("description", "这是一个经典的算法，通过...");
        explanation.put("complexity", "时间复杂度O(n)，空间复杂度O(1)");
        return explanation;
    }

    /**
     * 获取学习建议
     */
    @Override
    public Map<String, Object> getLearningAdvice(String problemId, String userLevel, String learningGoal)
    {
        Map<String, Object> advice = new HashMap<>();
        advice.put("level", userLevel);
        advice.put("goal", learningGoal);
        advice.put("suggestions", Arrays.asList("多做练习", "理解算法思想", "总结解题模式"));
        return advice;
    }

    /**
     * 评估代码
     */
    @Override
    public Map<String, Object> evaluateCode(String problemId, String userCode, String language)
    {
        Map<String, Object> evaluation = new HashMap<>();
        evaluation.put("score", 85);
        evaluation.put("quality", "良好");
        evaluation.put("comments", Arrays.asList("代码结构清晰", "变量命名规范", "可以进一步优化"));
        return evaluation;
    }

    /**
     * 获取相似题目推荐
     */
    @Override
    public List<Map<String, Object>> getSimilarProblems(String problemId, String userLevel, Integer limit)
    {
        List<Map<String, Object>> problems = new ArrayList<>();
        for (int i = 0; i < Math.min(limit, 5); i++) {
            Map<String, Object> problem = new HashMap<>();
            problem.put("id", "P" + (1000 + i));
            problem.put("name", "相似题目" + (i + 1));
            problem.put("difficulty", "中等");
            problems.add(problem);
        }
        return problems;
    }

    /**
     * 获取知识图谱
     */
    @Override
    public Map<String, Object> getKnowledgeGraph(String topic, String depth)
    {
        Map<String, Object> graph = new HashMap<>();
        graph.put("topic", topic);
        graph.put("depth", depth);
        graph.put("nodes", Arrays.asList("基础概念", "进阶应用", "相关算法"));
        return graph;
    }

    /**
     * 获取编程挑战
     */
    @Override
    public List<Map<String, Object>> getProgrammingChallenges(String userLevel, String category, Integer count)
    {
        List<Map<String, Object>> challenges = new ArrayList<>();
        for (int i = 0; i < Math.min(count, 3); i++) {
            Map<String, Object> challenge = new HashMap<>();
            challenge.put("id", "C" + (100 + i));
            challenge.put("name", "编程挑战" + (i + 1));
            challenge.put("difficulty", userLevel);
            challenges.add(challenge);
        }
        return challenges;
    }

    /**
     * 获取助手配置
     */
    @Override
    public Map<String, Object> getAssistantConfig(String userId)
    {
        Map<String, Object> config = new HashMap<>();
        config.put("userId", userId);
        config.put("aiLevel", "高级");
        config.put("language", "中文");
        config.put("autoSave", true);
        return config;
    }

    /**
     * 更新助手配置
     */
    @Override
    public int updateAssistantConfig(String userId, Map<String, Object> config)
    {
        // 实际项目中应该保存到数据库
        return 1;
    }

    /**
     * 获取助手统计信息
     */
    @Override
    public Map<String, Object> getAssistantStats(String userId, String timeRange)
    {
        Map<String, Object> stats = new HashMap<>();
        stats.put("userId", userId);
        stats.put("timeRange", timeRange);
        stats.put("totalConversations", conversationMap.size());
        stats.put("questionsAsked", conversationMap.size());
        return stats;
    }
} 